Case analysis of typical accidents in production safety
Case1:Fall accident of X branch
I. Overview of the accident
X, 2065438 15: 30, X Branch arranged a group of workers in the direct cyanide workshop to work overtime, and assisted the direct cyanide maintenance class to set up the sodium cyanide pipeline between the large sodium cyanide warehouse and the small sodium cyanide warehouse. At the after-work meeting, the squad leader Kou Moumou arranged the task of assisting the direct cyanide maintenance class to erect the pipeline, and assigned the cyanide post operator Wang Moumou to the overpass between the large sodium cyanide warehouse and the small sodium cyanide warehouse to assist in hoisting the sodium cyanide delivery pipeline. /kloc-at about 0/6 o'clock, Wang moumou ventured over the guardrail at the top of the acid leaching standby tank in the second stage of acid making, and went directly to the north end of the overpass to work without wearing a safety belt, causing himself to fall off the bridge to the ground (the height of the overpass is 4 meters from the ground). Later, he was sent to the Municipal Hospital of Traditional Chinese Medicine for treatment. After being diagnosed by the hospital, Wang was injured in the lumbar spine.
Two. The cause and nature of the accident
(1) The direct cause of the accident
The direct cause of this accident was that Wang had ventured over the guardrail at the top of the acid leaching reserve tank in the second stage of acid production, and went directly to the overpass without fastening the safety belt.
(2) the indirect cause of the accident
1. Coach, the squad leader of Operation 1, failed to handle aerial work tickets according to the system before aerial work, and failed to formulate corresponding safety precautions;
2. Qu Moumou, a branch safety officer, failed to supervise the aerial work ticket of this unit;
3. The branch factory failed to implement the ticket management system and neglected the management of aerial work.
(3) the nature of the accident
This is a fall accident caused by illegal operation.
Three. Accident prevention and rectification measures
(1) Sub-branch X immediately sorted out the contents of the notice, and the xx of 20 1x issued by the Safety and Environmental Protection Department, and reported the histology to the Safety and Environmental Protection Department before X *;
(2)× Branch immediately organized a special meeting on safety, which was in line with the safety accident? Four don't let go? In principle, report the accident and put forward preventive measures, and report the meeting to the security department before X.
(3) Each production unit should check for leaks and fill vacancies in peacetime, and make use of the contents of the notice. Xx of 20 1x issued by the safety and environmental protection department shall be handled, reviewed and filed in strict accordance with the system requirements.
(4) The branch factory should strengthen the training of workers' safety production laws and regulations and safety technology operating procedures.
multiple-choice
1, the nature of the accident is (c)
A. Accidents B. Criminal cases C. Illegal operation D. No-responsibility accidents
Case 2 Accident of Road Surface Contaminated by Carbide Slag
I. Overview of the accident
On the morning of xx, X month, 20 1x year, due to the high water content of carbide slag loaded by U53xxx transport vehicles, a large number of paste carbide slag dripped from the temporary parking place outside the factory. After discovering this problem in their work, Guo Moumou and Zu Moumou, the chief of the supply department, urged the suppliers to take immediate measures to deal with it. Without taking any measures, suppliers and drivers of transport vehicles walked through the factory roads until the unloading position, resulting in a large number of paste-like carbide slag dripping from the trunk board, which caused road pollution in the factory area of xx Company.
Two. The cause and nature of the accident
(a) the cause of the accident
1. The direct cause of this accident is that the supplier did not take measures to cross the factory road after the relevant personnel of the supply department pointed out the problem.
2. Although the Supply Department verbally dissuaded the supplier from dropping a large amount of pasty carbide slag, the indirect cause of the accident was ineffective measures.
(2) the nature of the accident
This accident is an environmental pollution accident caused by inadequate protective measures. Three. Accident prevention and rectification measures
1, the supply department should strengthen the management of suppliers and require suppliers to take effective measures in strict accordance with relevant requirements to prevent road pollution caused by scattered carbide slag;
2. The supply department and the safeguard department should strengthen the daily inspection of carbide slag transport vehicles and roads in the factory area and deal with related problems in time;
3. There is more rain in flood season, so calcium carbide slag suppliers and transport vehicles should take rainproof measures to prevent calcium carbide slag from polluting the environment due to rain.
Think about a problem
1. If you are the investigator of the accident, please tell me about your work process.
(1) Establish an accident investigation team.
(2) Accident scene treatment
(3) Collection of physical evidence
(4) Collect accident facts and data.
(5) Collection of witness materials
(6) On-site photography
(7) Drawing accident map
(8) Cause analysis of the accident
(9) Write accident investigation report
Case 3 Object Strike Accident
I. Overview of the accident
At about 0/7, 2065438, xx Branch arranged maintenance workers Zhu Moumou, Wang Moumou and Liu Moumou to repair the bucket of lime loading forklift. In the process of butt welding the fixed plate of the pin hole of the tipping bucket connecting rod, the fixed plate accidentally fell off, and Liu could not avoid the safety accident of the fracture of his left foot. After the accident, the branch immediately organized personnel to send him to the hospital for treatment.
Two. The cause and nature of the accident
(1) The direct cause of the accident
Liu, the maintenance worker, is not aware of safety and has insufficient understanding of potential safety hazards in the operation. Illegal operation and failure to wear labor protection articles as required are the direct causes of the accident.
(2) the indirect cause of the accident
1. Before the operation, the maintenance monitor Fan Moumou failed to identify the potential safety hazards and hazards during the operation, and the operators failed to implement effective communication, which was another reason for the accident.
2. The factory failed to supervise the safety measures and the wearing of labor protection articles when employees entered the confined space, which was another cause of the accident.
(3) the nature of the accident
According to the accident investigation, the accident category is a safety liability accident caused by illegal operation and failure to wear labor protection articles as required.
Three. Accident prevention and rectification measures
(1) Branch immediately organized a special safety meeting to report accident cases and preventive measures, and requested that the activities be reported to the environmental protection department in writing before xx.
(2) The factory urges the maintenance class to revise and improve the safety operation procedures according to the actual production situation to prevent the alarm bell from ringing.
(3) The Branch immediately organized all employees to carry out a self-examination and self-correction activity for potential safety hazards, and reported the investigation of potential safety hazards in writing before xx.
essay question
1. What is the accident category of this accident?
Answer: The accident category is a safety liability accident caused by illegal operation and failure to wear labor protection articles as required.
Case 4 Electric shock accident
I. Overview of the accident
At about 2 1 30 on October, 2065438, Tang moumou, the chief operating officer of the second section of the electrical instrument class of X branch factory, was found electrocuted by Jing moumou, the squad leader of the third class of acid production, while checking the air switch of the acid-making dust operation room 1# power distribution cabinet, and was reported to the branch factory for hospital treatment.
Two. The cause and nature of the accident
(1) The direct cause of the accident
Tang Moumou, the chief electrician on duty, has a weak sense of safety. In the process of live working, his thoughts are not concentrated and there is no professional supervision. The direct cause of the accident was the risky and illegal operation.
(2) the indirect cause of the accident
1. During the electrician operation in the electrical instrument section? A special person must be appointed for effective supervision? Poor implementation; Usually, safety education and training are a mere formality, which is the main reason for this accident.
2. The management of the electrician on duty at night in the branch factory is not in place, which is the secondary cause of this accident.
(3) the nature of the accident
Through accident analysis and investigation, it is determined that the accident category is a safety liability accident caused by illegal risky operation and violation of safety operation regulations.
Three. Accident prevention and rectification measures
(1) Branch immediately organized a special safety meeting, carried out self-examination and self-correction activities for potential safety hazards, and reported it to the environmental protection department in writing before xx.
(2) The factory urges all employees of the Electrical Instrument Department to learn the post safety operation procedures and conduct strict assessment, and report to the Ministry of Environmental Protection in writing before xx.
Multiple choice
Factors below 1. (ABDE) will increase the risk of electric shock on site.
A.**B * B * b. High temperature C. Wood floor D. Mobile electrical equipment and mobile wires E. Metal equipment.
Case 5 fire accident
One: What happened.
At 8: 00 a.m. on October X, 20 1x, post chemists Liu Moumou and Suo Moumou of X chemical by-products began to weigh samples for analysis. At 8: 10, Suo Moumou weighed the sample, moved it to the fume hood in the east of the sample dissolving room, and began to dissolve the sample. At that time, everything in the room was normal, so Suo Moumou returned to the instrument room for other operations. At 8: 00 13, Liu weighed the sample and began to dissolve it in the west fume hood. At 8: 15, when the switch of the fume hood was turned on, the fume hood suddenly caught fire. Liu immediately cut off the power and called the police for help. After Suo Moumou rushed to the sample dissolving room, he found that the fume hood was on fire and the smoke in the room was rolling. The two of them left the scene after doing the necessary disposal.
Two: accident investigation
Afterwards, the safety and environmental protection department, the security department and the quality inspection department jointly investigated the accident, and initially determined that the main cause of the fire was the accumulation of combustible gas caused by long-term analysis of acid samples in the fume hood.
Fume hoods and pipes have been used for more than 6 years, which leads to the accumulation of combustible materials and is not cleaned up, which is another main cause of fire.
The post operator failed to understand the ventilation subroutine before turning on the electric furnace, which was the secondary cause of the fire.
Three: accident prevention measures
1. Clean the exhaust cabinet regularly, check the power supply circuit and maintain the equipment.
2. Understand and discuss the operating procedures of equipment, formulate feasible post operating procedures, strengthen staff business training, and put an end to preventable safety accidents.
Multiple choice
1. The following statement about the relationship between hazard and accident hidden danger is correct (A).
A. hidden dangers of accidents must be hazards.
B. the hazard source must be an accident hidden danger.
C. major hazards must be hidden dangers of accidents.
D. major accidents must be major hazards.
2. The correct way to escape by using the existing facilities in the building is (ABCE).
A. use the fire elevator for evacuation and escape.
B. Use indoor smoke-proof stairs, ordinary stairs and closed stairs to escape.
C use balconies, corridors, refuge floors and indoor descenders, life-saving bags, safety ropes, etc. Escape from the building.
D. Take refuge and escape by ordinary elevator or sightseeing elevator.
E. Use the downspout near the wall to escape.
Case 6 High-altitude falling accident
First, after the accident
At 6: 40 p.m.1on the afternoon of X, 2065438, the pressure indication of the front main pipe of the second stage of the sulfuric acid plant of X Branch was distorted. After checking the pressure pipeline, the assistant operator Jiao Moumou fell from the bracket at 2.8 meters on the platform on the second floor of the third floor of the electric fog, causing a scalp scratch on the right wrist fracture. After being discovered by assistant operator Zhao Moumou and reporting to the factory director, he was immediately sent to the city hospital for treatment.
Second, the cause and nature of the accident
(1) The direct cause of the accident
1, the operator Jiao Moumou violated the rules, the safety protection articles for aerial work were not fully worn, and the safety belt and helmet were not fastened as required;
2. Ji Moumou, the security officer of X Branch, failed to supervise the aerial work ticket of this unit, and did not apply for aerial work ticket during aerial work.
(2) the indirect cause of the accident
The monitor didn't pay attention to safety when arranging the inspection and filling the leak, and didn't make corresponding safety measures.
(3) the nature of the accident
This is a fall accident caused by illegal operation. III. Accident Prevention and Rectification Measures
X branch immediately organized a special safety meeting, which was in line with the safety accident? Four don't let go? In principle, report the accident and put forward preventive measures, and report the meeting to the security department before X.
Case 7 Object Strike Accident Mechanical Injury Accident
Case 7. 1:? x.x？ After the accident:
On X, X, the maintenance man of sulfuric acid plant was responsible for replacing the water tank in front of the furnace during the overhaul of X plant. After the water tank was unloaded, the cadres on duty left the scene and handed it over to four maintenance workers to transfer the water tank. During the transfer process, the right thumb of Peng Moumou, who replaced the water tank, was crushed because of the blind spot in the line of sight of the personnel pushing the water tank and replacing the drum.
The cause of the accident
1, the operator Peng Moumou has a weak sense of self-safety, and illegal operation is the main cause of the accident;
2. The direct cause of this accident is that Baopian cadres did not do a good job in employee safety education and did not monitor the whole process;
3. The indirect cause of the accident is that the safety management of xx branch factory is not in place, and the safety production responsibility system, management system and operation procedures are not strictly implemented.
Case 7.2:? x.x？ Accident process
On the afternoon of X, the pickling machine underflow hose pump hose was replaced in the gold dipping section of xx branch. During the reverse rotation of the hose pump, the maintenance worker He Moumou stood unsteadily and pressed his left hand into the observation hole of the hose pump cavity. The left hand was injured by the rotating hose pump pressure bar, resulting in the fracture of the left palm.
The cause of the accident
1, operator He Moumou's lack of safety awareness is the main cause of this accident.
2. The damage to the safety protection facilities of the observation hole in the pump cavity of the hose pump is the direct cause of the accident;
3. The factory didn't organize the maintenance project. The indirect cause of the accident was the knowledge of the safe operation and maintenance of the hose pump.
Case 7.3:? x.x？ Accident process
At about 0/5: 00 on X day/KLOC-0, Dong Moumou, the forklift driver of No.5 raw material class, loaded ore in X branch. When the ore is loaded and reversed, the bucket falls and hangs on the car board of the rotary car. At that time, Yang Moumou, the driver of the rotary car, stood in the cab and fell on the dashboard of the cab, causing Yang Moumou, the driver of the rotary car, to have a spinal injury.
The cause of the accident
The brake failure of 1 and No.5 forklifts was the main cause of the accident.
2. The forklift driver Dong Moumou underestimated the safety hazards during ore loading, which was the direct cause of the accident.
3. Jane, the forklift squad leader, failed to maintain the forklift on time, which was the indirect cause of the accident;
Accident prevention and rectification measures
1, each branch immediately organized a special meeting on safety, which was in line with the safety accident? Four don't let go? In principle, report the accident and put forward preventive measures, and report the meeting minutes, signature forms and other materials to the environmental protection department before X.
2. Each branch factory shall organize a comprehensive investigation on the safety protection facilities of various operating equipment such as hose pumps, and report the investigation to the environmental protection department in writing before X months.
3. The production department will organize all forklift class members to learn accident cases, further improve forklift safety operation procedures, conduct a comprehensive investigation of forklift hidden dangers, and report the investigation situation to the Ministry of Environmental Protection in writing before X month X day;
4, each unit should organize personnel to seriously study accident cases above * *, and combined with their actual work, to carry out self-examination and self-correction activities;
5, all units should strengthen the training and education of cadres and employees, improve the safety awareness of all employees, do? Four doesn't hurt?
Case 8 Burn accident
First, after the accident
At X 14: 50, 2065438, Gu Moumou, the squad leader of the second-stage acid production, found that a belt was missing in the second-stage acid leaching tank, and immediately stopped the scraper and acid leaching stirring and arranged maintenance.
Yan Moumou and Guo Moumou check the belt model. When the maintenance personnel evacuated from the site to prepare for replacement after confirming the belt model, because the hot slag accumulated after the scraper stopped for a short time was mixed with the liquid in the acid leaching tank, a large amount of hot steam was instantly ejected from the observation port of the acid leaching tank, which burned the arm and abdomen of Guo Moumou, a maintenance worker who was leaving the site.
Second, the cause of the accident
1, the observation port of the acid leaching tank was blocked by mud, and the safety precautions were not in place, which was the direct cause of the accident;
2. The maintenance worker Guo Moumou's weak safety awareness and irregular wearing of safety protection articles are another reason for the accident;
3. The factory turned a blind eye to the opening position of the observation port of the acid leaching tank and the inertia violation state of plugging with mud, and the usual hidden danger investigation became a mere formality, resulting in the accident? Favorable? Conditions.
Third, accident prevention.
1. Each branch factory should learn from this accident, conduct a comprehensive investigation of all equipment safety facilities and accessories, and establish a regular inspection account to prevent such accidents from happening again. Anhuanke will carry out special inspection on the investigation and implementation of each branch factory.
2, each branch should use the time before and after work to focus on the recent safety and environmental protection bulletin, according to the safety accident? Four don't let go? The principle of self-examination and self-correction activities, and report the activities to the security department in writing before X.
3. Each branch factory should strengthen the construction of hazard identification, hidden danger investigation and publicity system of each post and the training of employees' self-safety awareness, and report the rectification to the environmental protection department in writing before X months.
What is the basic procedure of accident investigation?
Reference answer
The accident investigation shall be conducted according to the following procedures:
(1) Establish an accident investigation team.
(2) Accident scene treatment
(3) Collection of physical evidence
(4) Collect accident facts and data.
(5) Collection of witness materials
(6) On-site photography
(7) Drawing accident map
(8) Cause analysis of the accident
9) Prepare accident investigation report
Case 9 Poisoning and Burn Accidents
First, after the accident
At 9: 05 am on X, X, when Zhou Moumou, the chief operator of the pottery machine post in X Branch, observed the pressure gauge during the washing process of the pottery machine, the joint between the nitric acid pipeline and the pressure gauge was corroded and cracked, and Zhou Moumou was splashed with nitric acid to burn his face and neck.
Second, the cause of the accident
(1) The main reasons for this accident are that the safety management of X branch factory is not in place and the protective measures of acid-making process in pottery machine post are not perfect.
(2) The secondary cause of this accident is that the X factory failed to educate and train its employees on safety operation procedures.
(3) The lack of safety awareness of Zhou Moumou, the chief operating officer of the pottery machine post, is another reason for this accident.
III. Accident Prevention and Rectification Measures
1. Before inspection (maintenance), all production units must identify the hazards in the inspection (maintenance) places and parts, formulate corresponding safety measures, and organize maintenance personnel to conduct training.
2. When working in dangerous (special) places, you must correctly wear labor protection articles corresponding to the working environment in accordance with safety regulations.
3. Each branch factory should learn from this accident, conduct a comprehensive investigation of all equipment safety facilities and accessories, and establish a regular inspection account to prevent such accidents from happening again.
Case 10 Object Strike Accident
First, what happened?
On the afternoon of October, 2065438 14: 30, Huang Moumou, a hygienist in the raw material class of X branch, derailed his left leg while dumping slag in the yard. As a result of the pain, when he subconsciously squatted down, the handlebar of the bucket car fell off, leading to a safety accident of clavicle fracture in his left shoulder.
Second, the cause and nature of the accident
(a), the cause of the accident
1 The illegal operation of Huang Moumou, a hygienist in the raw material class of X branch factory, is the direct cause of this safety liability accident.
2. The main reason of this safety accident is that the raw material class of X Branch failed to identify the dangerous source of working instruments and failed to investigate and manage the potential safety hazards.
3. The secondary cause of this safety accident is that the raw material class of X branch failed to educate and train the daily workers on safety operation procedures.
(2) the nature of the accident
This is a safety responsibility accident caused by the failure to implement the safety management system and the illegal operation of personnel.
III. Accident Prevention and Rectification Measures
1, x branch immediately organized a special meeting on safety, informed the accident situation, put forward preventive measures, and reported the implementation of the meeting to the environmental protection department before x month 17.
2, the production workshop to use the briefing to learn * * safe production responsibility system, in strict accordance with the requirements to do a good job in the investigation and management of hidden dangers, safety special ledger registration and filing.
All production branches should learn from this accident and carry out targeted development? Level three? Carry out education and training, identify hazards in adjacent posts, and implement safety precautions to resolutely curb the recurrence of similar accidents.